One thing that strikes me about this discussion is that many Christians are in favor of teaching creationism in schools and it's further clear that each one thinks that the version taught will be THEIR version.
But how would a YECer feel if OEC were the version of creationism taught. How would both feel if it were a version of ID that accepts common descent?
One of the main reasons the founders wanted separation was to avoid such sectarianism, and that's quite beside the issue that no version of creationism is remotely scientific.